2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 127Get this manual
FUEL SYSTEM ('04'05) Remove the float pin by gently tapping it with suitable driver (O.D mm)Remove the float and float valveCheck the float for damageFLOAT
FLOAT VALVE FLOAT PIN Inspect the float valve seat for scores, scratches, clogging and damageCheck the tip of the float valve where it contacts the valve seat for stepped wear or contaminationReplace the float valve if the tip is worn or comtaminatedCheck the operation of the float valveFLOAT VALVE
Handle all jets with careThey can easily be scored or scratched
Remove the main jet, loosen the lock nut and remove the needle jet holder and needle jetRemove the slow jetRubber plug and starter jet